object ArithoperDemo01 {
  def main(args: Array[String]): Unit = {
    var r1: Int = 7 / 7
    println("r1 = " + r1)
    var r2: Double = 10 / 3
    println("r2 = " + r2)
    var r3: Double = 10.0 / 3
    println("r3 = " + r3)
    println("r3 = " + r3.formatted("%.2f"))
    println(10 % 3)
    println(-10 % 3)
    println(-10 % -3)
    println(10 % -3)
    var num1 = 10
    num1 += 1
    num1 -= 1
    println(num1) //10
  }
}